Changes in Makefile

9b400d17 - kbuild: Introduce Kconfig symbol for linking vmlinux with relocations

Tue, 11 Mar 2025 11:06:19 +0000

kbuild: Introduce Kconfig symbol for linking vmlinux with relocationsSome architectures build vmlinux with static relocations preserved, butstrip them again from the final vmlinux image. Arch specific toolsconsume these static relocations in order to construct relocation tablesfor KASLR.The fact that vmlinux is created, consumed and subsequently updated goesagainst the typical, declarative paradigm used by Make, which is basedon rules and dependencies. So as a first step towards cleaning this up,introduce a Kconfig symbol to declare that the arch wants to consume thestatic relocations emitted into vmlinux. This will be wired up furtherin subsequent patches.Signed-off-by: Ard Biesheuvel Signed-off-by: Masahiro Yamada List of files: /linux-6.15/arch/mips/Makefile

04e4ec98 - MIPS: migrate to generic rule for built-in DTBs

Sun, 22 Dec 2024 00:04:13 +0000

MIPS: migrate to generic rule for built-in DTBsCommit 654102df2ac2 ("kbuild: add generic support for built-in bootDTBs") introduced generic support for built-in DTBs.Select GENERIC_BUILTIN_DTB and BUILTIN_DTB_ALL when the built-in DTBsupport is enabled.DTBs compiled under arch/mips/boot/dts/ will be wrapped by the genericrule in scripts/Makefile.vmlinux.Signed-off-by: Masahiro Yamada Signed-off-by: Thomas Bogendoerfer List of files: /linux-6.15/arch/mips/Makefile

2326c8f2 - MIPS: Fix fallback march for SB1

Sun, 14 Jul 2024 02:52:57 +0000

MIPS: Fix fallback march for SB1Fallback march for SB1 should be mips64 instead of mips64r1.Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202407111851.LwDasTcp-lkp@intel.com/Fixes: bfc0a330c1b4 ("MIPS: Fallback CPU -march flag to ISA level if unsupported")Signed-off-by: Jiaxun Yang Signed-off-by: Thomas Bogendoerfer List of files: /linux-6.15/arch/mips/Makefile

8a618697 - MIPS: Loongson64: test for -march=loongson3a cflag

Fri, 02 Feb 2024 18:21:44 +0000

MIPS: Loongson64: test for -march=loongson3a cflagCurrently march flag is hardcoded to loongson3a for GCC andmips64r2 for clang.We can actually test it to simplify the code.Signed-off-by: Jiaxun Yang Signed-off-by: Thomas Bogendoerfer List of files: /linux-6.15/arch/mips/Makefile

e7a30874 - MIPS: BMIPS: Drop unnecessary assembler flag

Fri, 02 Feb 2024 18:21:43 +0000

MIPS: BMIPS: Drop unnecessary assembler flagNowadays GCC will always pass -march flag to gas, so thereis no need to pass another mips32 flag to assembler.Signed-off-by: Jiaxun Yang Signed-off-by: Thomas Bogendoerfer List of files: /linux-6.15/arch/mips/Makefile

bfc0a330 - MIPS: Fallback CPU -march flag to ISA level if unsupported

Fri, 02 Feb 2024 18:21:42 +0000

MIPS: Fallback CPU -march flag to ISA level if unsupportedLLVM does not implement some of -march options. However those optionsare not mandatory for kernel to build for those CPUs.Fallback -march CFLAG to ISA level if unsupported by toolchain sowe can get those kernel to build with LLVM.Link: https://github.com/ClangBuiltLinux/linux/issues/1544Reported-by: Nathan Chancellor Signed-off-by: Jiaxun Yang Signed-off-by: Thomas Bogendoerfer List of files: /linux-6.15/arch/mips/Makefile

1d59822a - MIPS: Remove cc-option checks for -march=octeon

Fri, 02 Feb 2024 18:21:41 +0000

MIPS: Remove cc-option checks for -march=octeonNowadays our minimal supported GCC/Clang all support -march=octeon.Remove cc-option checks to simplify code.Signed-off-by: Jiaxun Yang Signed-off-by: Thomas Bogendoerfer List of files: /linux-6.15/arch/mips/Makefile

18ca63a2 - MIPS: Probe toolchain support of -msym32

Fri, 02 Feb 2024 18:21:40 +0000

MIPS: Probe toolchain support of -msym32msym32 is not supported by LLVM toolchain.Workaround by probe toolchain support of msym32 for KBUILD_SYM32feature.Link: https://github.com/ClangBuiltLinux/linux/issues/1544Signed-off-by: Jiaxun Yang Signed-off-by: Thomas Bogendoerfer List of files: /linux-6.15/arch/mips/Makefile

0859bdf1 - Revert MIPS: Loongson: Fix build error when make modules_install

Tue, 18 Jul 2023 14:37:27 +0000

Revert MIPS: Loongson: Fix build error when make modules_installRevert commit 531b3d1195d0 ("MIPS: Loongson: Fix build error when makemodules_install"), which made `-march=loongson2e', `-march=loongson2f',and `-march=loongson3a' compilation options probed for even though GCChas supported them since 4.4.0, 4.4.0, and 4.6.0 respectively, which isbelow our current minimum requirement of 5.1, in an attempt to workaround for the `cc-option' `make' function being undefined with `make'targets that do not use the compiler. The workaround has now been madeobsolete, by querying the `need-compiler' variable instead so as to makesure the compiler isn't called for non-build targets.Verified with `fuloong2e_defconfig' and the `modules_install' target.Signed-off-by: Maciej W. Rozycki Signed-off-by: Thomas Bogendoerfer List of files: /linux-6.15/arch/mips/Makefile

4fe4a637 - MIPS: Only fiddle with CHECKFLAGS if `need-compiler'

Tue, 18 Jul 2023 14:37:23 +0000

MIPS: Only fiddle with CHECKFLAGS if `need-compiler'We have originally guarded fiddling with CHECKFLAGS in our arch Makefileby checking for the CONFIG_MIPS variable, not set for targets such as`distclean', etc. that neither include `.config' nor use the compiler.Starting from commit 805b2e1d427a ("kbuild: include Makefile.compileronly when compiler is needed") we have had a generic `need-compiler'variable explicitly telling us if the compiler will be used and thus itscapabilities need to be checked and expressed in the form of compilationflags. If this variable is not set, then `make' functions such as`cc-option' are undefined, causing all kinds of weirdness to happen ifwe expect specific results to be returned, most recently:cc1: error: '-mloongson-mmi' must be used with '-mhard-float'messages with configurations such as `fuloong2e_defconfig' and the`modules_install' target, which does include `.config' and yet does notuse the compiler.Replace the check for CONFIG_MIPS with one for `need-compiler' instead,so as to prevent the compiler from being ever called for CHECKFLAGS whennot needed.Reported-by: Guillaume Tucker Closes: https://lore.kernel.org/r/85031c0c-d981-031e-8a50-bc4fad2ddcd8@collabora.com/Signed-off-by: Maciej W. Rozycki Fixes: 805b2e1d427a ("kbuild: include Makefile.compiler only when compiler is needed")Cc: stable@vger.kernel.org # v5.13+Reported-by: "kernelci.org bot" Signed-off-by: Thomas Bogendoerfer List of files: /linux-6.15/arch/mips/Makefile

a79a404e - MIPS: Fix CONFIG_CPU_DADDI_WORKAROUNDS `modules_install' regression

Tue, 18 Jul 2023 14:37:18 +0000

MIPS: Fix CONFIG_CPU_DADDI_WORKAROUNDS `modules_install' regressionRemove a build-time check for the presence of the GCC `-msym32' option.This option has been there since GCC 4.1.0, which is below the minimumrequired as at commit 805b2e1d427a ("kbuild: include Makefile.compileronly when compiler is needed"), when an error message:arch/mips/Makefile:306: *** CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32. Stop.started to trigger for the `modules_install' target with configurationssuch as `decstation_64_defconfig' that set CONFIG_CPU_DADDI_WORKAROUNDS,because said commit has made `cc-option-yn' an undefined function fornon-build targets.Reported-by: Jan-Benedict Glaw Signed-off-by: Maciej W. Rozycki Fixes: 805b2e1d427a ("kbuild: include Makefile.compiler only when compiler is needed")Cc: stable@vger.kernel.org # v5.13+Reviewed-by: Philippe Mathieu-Daudé Signed-off-by: Thomas Bogendoerfer List of files: /linux-6.15/arch/mips/Makefile

531b3d11 - MIPS: Loongson: Fix build error when make modules_install

Wed, 28 Jun 2023 11:08:47 +0000

MIPS: Loongson: Fix build error when make modules_installAfter commit 0e96ea5c3eb5904e5dc2f ("MIPS: Loongson64: Clean up use ofcc-ifversion") we get a build error when make modules_install:cc1: error: '-mloongson-mmi' must be used with '-mhard-float'The reason is when make modules_install, 'call cc-option' doesn't workin $(KBUILD_CFLAGS) of 'CHECKFLAGS'. Then there is no -mno-loongson-mmiapplied and -march=loongson3a enable MMI instructions.To be detail, the error message comes from the CHECKFLAGS invocation of$(CC) but it has no impact on the final result of make modules_install,it is purely a cosmetic issue. The error occurs because cc-option isdefined in scripts/Makefile.compiler, which is not included in Makefilewhen running 'make modules_install', as install targets are not supposedto require the compiler; see commit 805b2e1d427aab4b ("kbuild: includeMakefile.compiler only when compiler is needed"). As a result, the callto check for '-mno-loongson-mmi' just never happens.Fix this by partially reverting to the old logic, use 'call cc-option'to conditionally apply -march=loongson3a and -march=mips64r2.By the way, Loongson-2E/2F is also broken in commit 13ceb48bc19c563e05f4("MIPS: Loongson2ef: Remove unnecessary {as,cc}-option calls") so fix ittogether.Fixes: 13ceb48bc19c563e05f4 ("MIPS: Loongson2ef: Remove unnecessary {as,cc}-option calls")Fixes: 0e96ea5c3eb5904e5dc2 ("MIPS: Loongson64: Clean up use of cc-ifversion")Cc: stable@vger.kernel.orgCc: Feiyang Chen Cc: Nathan Chancellor Cc: Nick Desaulniers Signed-off-by: Huacai Chen Reviewed-by: Nathan Chancellor Signed-off-by: Thomas Bogendoerfer List of files: /linux-6.15/arch/mips/Makefile

08f6554f - mips: Include KBUILD_CPPFLAGS in CHECKFLAGS invocation

Thu, 01 Jun 2023 18:38:24 +0000

mips: Include KBUILD_CPPFLAGS in CHECKFLAGS invocationA future change will move CLANG_FLAGS from KBUILD_{A,C}FLAGS toKBUILD_CPPFLAGS so that '--target' is available while preprocessing.When that occurs, the following error appears when building ARCH=mipswith clang (tip of tree error shown): clang: error: unsupported option '-mabi=' for target 'x86_64-pc-linux-gnu'Add KBUILD_CPPFLAGS in the CHECKFLAGS invocation to keep everythingworking after the move.Signed-off-by: Nathan Chancellor Signed-off-by: Masahiro Yamada List of files: /linux-6.15/arch/mips/Makefile

194a8352 - MIPS: Loongson: Move arch cflags to MIPS top level Makefile

Tue, 04 Apr 2023 09:33:47 +0000

MIPS: Loongson: Move arch cflags to MIPS top level MakefileArch cflags should be independent to Platform.Signed-off-by: Jiaxun Yang Signed-off-by: Thomas Bogendoerfer List of files: /linux-6.15/arch/mips/Makefile

337ff6bb - MIPS: Prefer cc-option for additions to cflags

Thu, 12 Jan 2023 03:05:00 +0000

MIPS: Prefer cc-option for additions to cflagsA future change will switch as-option to use KBUILD_AFLAGS instead ofKBUILD_CFLAGS to allow clang to drop -Qunused-arguments, which may causeissues if the flag being tested requires a flag previously added toKBUILD_CFLAGS but not KBUILD_AFLAGS. Use cc-option for cflags additionsso that the flags are tested properly.Signed-off-by: Nathan Chancellor Acked-by: Thomas Bogendoerfer Reviewed-by: Nick Desaulniers Reviewed-by: Philippe Mathieu-Daudé Tested-by: Linux Kernel Functional Testing Tested-by: Anders Roxell Signed-off-by: Masahiro Yamada List of files: /linux-6.15/arch/mips/Makefile

80a20d2f - MIPS: Always use -Wa,-msoft-float and eliminate GAS_HAS_SET_HARDFLOAT

Thu, 12 Jan 2023 03:04:59 +0000

MIPS: Always use -Wa,-msoft-float and eliminate GAS_HAS_SET_HARDFLOAT-Wa,-msoft-float is tested with as-option, which will be a problem forclang with an upcoming change to move as-option to use KBUILD_AFLAGSinstead of KBUILD_CFLAGS due to a lack of '-mno-abicalls' inKBUILD_AFLAGS at the point that this check occurs; $(cflags-y) is addedto KBUILD_AFLAGS towards the end of this file. clang: error: ignoring '-fno-PIE' option as it cannot be used with implicit usage of -mabicalls and the N64 ABI [-Werror,-Woption-ignored]This could be resolved by switching to a cc-option check but'$(cflags-y)' would need to be added so that '-mno-abicalls' is presentfor the test. However, this check is no longer necessary, as-msoft-float is supported by all supported assembler versions (GNU as2.25+ and LLVM 11+). Eliminate GAS_HAS_SET_HARDFLOAT and all of itsuses, inlining SET_HARDFLOAT where necessary.Link: https://lore.kernel.org/202209101939.bvk64Fok-lkp@intel.com/Reported-by: kernel test robot Signed-off-by: Nathan Chancellor Acked-by: Thomas Bogendoerfer Reviewed-by: Nick Desaulniers Reviewed-by: Philippe Mathieu-Daudé Tested-by: Linux Kernel Functional Testing Tested-by: Anders Roxell Signed-off-by: Masahiro Yamada List of files: /linux-6.15/arch/mips/Makefile

d42f0c6a - MIPS: Use "grep -E" instead of "egrep"

Fri, 18 Nov 2022 08:28:11 +0000

MIPS: Use "grep -E" instead of "egrep"The latest version of grep claims the egrep is now obsolete so the buildnow contains warnings that look like: egrep: warning: egrep is obsolescent; using grep -Efix this up by moving the related file to use "grep -E" instead.Here are the steps to install the latest grep: wget http://ftp.gnu.org/gnu/grep/grep-3.8.tar.gz tar xf grep-3.8.tar.gz cd grep-3.8 && ./configure && make sudo make install export PATH=/usr/local/bin:$PATHSigned-off-by: Tiezhu Yang Signed-off-by: Thomas Bogendoerfer List of files: /linux-6.15/arch/mips/Makefile

ce697cce - kbuild: remove head-y syntax

Sat, 24 Sep 2022 18:19:15 +0000

kbuild: remove head-y syntaxKbuild puts the objects listed in head-y at the head of vmlinux.Conventionally, we do this for head*.S, which contains the kernel entrypoint.A counter approach is to control the section order by the linker script.Actually, the code marked as __HEAD goes into the ".head.text" section,which is placed before the normal ".text" section.I do not know if both of them are needed. From the build systemperspective, head-y is not mandatory. If you can achieve the proper codeplacement by the linker script only, it would be cleaner.I collected the current head-y objects into head-object-list.txt. It isa whitelist. My hope is it will be reduced in the long run.Signed-off-by: Masahiro Yamada Tested-by: Nick Desaulniers Reviewed-by: Nicolas Schier List of files: /linux-6.15/arch/mips/Makefile

d3164e2f - MIPS: Remove VR41xx support

Tue, 05 Jul 2022 16:46:25 +0000

MIPS: Remove VR41xx supportNo (active) developer owns this hardware, so let's remove Linux support.Signed-off-by: Thomas Bogendoerfer List of files: /linux-6.15/arch/mips/Makefile

34275ac2 - mips: Always permit to build u-boot images

Sun, 06 Mar 2022 15:16:48 +0000

mips: Always permit to build u-boot imagesThe platforms where the kernel should be loaded above 0x8000.0000 do notsupport loading u-boot images, that doesn't mean that we shouldn't beable to generate them.Additionally, since commit 79876cc1d7b8 ("MIPS: new Kconfig optionZBOOT_LOAD_ADDRESS"), the $(zload-y) variable was no longer hardcoded,which made it impossible to use the uzImage.bin target.Fixes: 79876cc1d7b8 ("MIPS: new Kconfig option ZBOOT_LOAD_ADDRESS")Cc: Signed-off-by: Paul Cercueil Signed-off-by: Thomas Bogendoerfer List of files: /linux-6.15/arch/mips/Makefile